Undetectable AI vs. AcademicHelp’s Paraphrasing Tool: Completely Different Purposes

AI detection has gotten out of hand, and tools that can avoid AI detection has been more popular than ever. Today, let's compare Undetectable AI and AcademicHelp's Paraphraser.

John Angelo Yap

Updated April 10, 2024

A robot writer, generated with Midjourney

A robot writer, generated with Midjourney

Reading Time: 5 minutes

Paraphrasers have existed on the internet since the dawn of time. Okay, maybe not that long, but it's been around for quite some time. Like other resources in the internet, it has evolved over time to fit the needs of its era.

A few years ago, the main purpose of paraphrasers is to create original text from an input so that it avoids plagiarism detectors. Now, the same principles apply to paraphrasers, but the tools they're actively trying to avoid are now AI detectors.

Today, both kinds of paraphrasers co-exist in their own tiny corners of the internet. So, I'm here to compare them through Undetectable AI and AcademicHelp to decide, once and for all, which is better. Or, at least, which better suits your needs.

What is Undetectable AI and AcademicHelp?

Undetectable AI no longer needs an introduction if you’ve been reading our articles long enough, but I’ll give you one anyway. It’s a paraphraser aimed at turning machine-generated text into something that reads more human. The trick behind this is simple: Undetectable AI eliminates common AI words and phrases, repetition, and intentionally adds mistakes.

Academic Help, on the other hand, is a collection of free tools for academic purposes, such as summarizers, essay writers, and a citation generator. One of their features is a free paraphraser, which we’ll focus on today.

Undetectable AI vs. AcademicHelp: Quality

Let’s start with a simple question: Which tool creates a more fluent and creative paraphrase of your text? For this comparison, allow me to generate a short essay from ChatGPT and use it as input for both tools.

Original ChatGPT Text

Nick Drake, the enigmatic English singer-songwriter, left an indelible mark on the music landscape despite his tragically short life. Born in 1948, Drake's ethereal voice and poetic lyrics captivated listeners, yet his music remained largely overlooked during his lifetime. His introspective songs, characterized by intricate guitar work and melancholic melodies, explored themes of solitude, nature, and the human condition.


Drake released three albums during the late 1960s and early 1970s, including "Five Leaves Left," "Bryter Layter," and "Pink Moon," each showcasing his unique blend of folk, jazz, and blues influences. Despite critical acclaim, commercial success eluded him, and Drake struggled with depression and self-doubt. Tragically, he passed away in 1974 at the age of 26, leaving behind a small but profound musical legacy.


In the decades following his death, Nick Drake's music experienced a resurgence in popularity, earning him recognition as one of the most influential singer-songwriters of his generation. His timeless songs continue to resonate with audiences worldwide, ensuring that his legacy endures far beyond his brief time on Earth.

Undetectable AI

Rephrase.info

Nick Drake, the singer songwriter made a lasting impact, on the music scene despite his short life. Born in 1948 Drakes voice and poetic lyrics captured the hearts of listeners although his music was largely underappreciated at the time. His introspective songs featured guitar work and melancholic melodies delving into themes of solitude, nature and human experiences.


Drake released three albums in the 1960s and early 1970s. "Five Leaves Left," "Bryter Layter," and "Pink Moon”. Each reflecting his fusion of folk, jazz and blues elements. Despite praise he struggled to achieve success and battled with feelings of sadness and uncertainty. Tragically he passed away in 1974 at 26 years old leaving behind a impactful musical legacy.


In the years that followed his passing Nick Drakes music saw a resurgence in popularity as he was hailed as one of the eras singer songwriters. His timeless tunes continue to connect with audiences ensuring that his influence lives on after his time, among us.

Nick Drake, the mysterious British singer-songwriter, made a lasting impact on the music world despite his short life. Drake was born in 1948 and his captivating voice and poetic lyrics were adored by listeners, though his music was not widely appreciated during his lifetime. His introspective songs, known for their intricate guitar work and melancholic melodies, delved into themes of isolation, nature, and human experiences.


During the late 60s and early 70s, Drake released three albums – "Five Leaves Left," "Bryter Layter," and "Pink Moon" – each showcasing his unique fusion of folk, jazz, and blues influences. Despite critical acclaim, commercial success eluded him, leading to struggles with depression and self-doubt. Sadly, he passed away in 1974 at just 26 years old, leaving behind a small yet profound musical legacy.


In the years following his death, Nick Drake's music saw a resurgence in popularity, solidifying his status as one of the most influential singer-songwriters of his time. His timeless songs still connect with audiences around the globe, ensuring that his legacy lives on long after his untimely departure.

I’ve highlighted the mistakes of each version of the original text. Notice anything yet?

Undetectable AI has a lot more errors than AcademicHelp. In fact, it has more than ten errors when the latter has none. The reason for this is to avoid AI detection, but one does wonder if it’s going too overboard.

On the other hand, Academic Help is much more fluent. But for something that markets itself as a straight paraphraser instead of a humanizer, it relies too heavily on synonyms to make it work. The results are night and day when comparing this output to Scribbr, a different paraphraser that’s not aimed at avoiding AI detection.

The bottom line is this: Undetectable AI has reasons for its lack of creativity. Does AcademicHelp do? I don’t think so. 

I’ve always disliked paraphrasers that focus on synonyms instead of actually creating word and sentence variety, instead using figurative language to showcase their creativity. Both these paraphrasers are guilty of this. Though in this head-to-head, I’m giving the edge to AcademicHelp, but only because of its technical accuracy instead of creativity.

Undetectable AI vs. AcademicHelp: Detection

I know that AcademicHelp isn’t really made to create a humanized version of a text. But we should still try and see what happens if we plug their outputs into Sapling (crowned as the best free AI detection tool in our latest testing). Here’s how Undetectable AI and AcademicHelp’s paraphrasing tool fare against AI detection:

Test #1

Undetectable AI: Passes as human writing.
AI Likelihood Score: 0%

AcademicHelp: Detected as machine-generated.
AI Likelihood Score: 100%

Test #2

Undetectable AI: Passes as human writing.
AI Likelihood Score: 0%

AcademicHelp: Detected as machine-generated.
AI Likelihood Score: 100%

Test #3

Undetectable AI: Passes as human writing.
AI Likelihood Score: 7.5%

AcademicHelp: Detected as machine-generated.
AI Likelihood Score: 100%

Test #4

Undetectable AI: Passes as human writing.
AI Likelihood Score: 0%

AcademicHelp: Detected as machine-generated.
AI Likelihood Score: 100%

Test #5

Undetectable AI: Passes as human writing.
AI Likelihood Score: 0.9%

AcademicHelp: Detected as machine-generated.
AI Likelihood Score: 100%

Test #6

Undetectable AI: Passes as human writing.
AI Likelihood Score: 5.4%

AcademicHelp: Detected as machine-generated.
AI Likelihood Score: 100%

Average Score

Test Number

Undetectable AI

AcademicHelp

Test #1

0%

100%

Test #2

0%

100%

Test #3

7.5%

100%

Test #4

0%

100%

Test #5

0.9%

100%

Test #6

5.4%

100%

Average AI Likelihood

2.3%

100%

Undetectable AI vs. AcademicHelp: Pricing

Undetectable AI is a subscription-based service that starts at $14.99 for 15,000 words and climbs up to $209 for 380,000 words if you pay monthly. If you want to save money, you can pay for their tool annually instead. This shrinks the starting price from $14.99 to $5 per month (for 10,000 words), and the maximum price from $209 to $89.92 (for 300,000 words) per month.

AcademicHelp’s paraphrasing tool is completely free. You just need to sign-up, and you can generate a paraphrased version of a 2000-word text. Unfortunately, any number higher than that has to be inputted separately into their tool and concatenated manually.

All Said And Done

If we're just counting the number of points each tool won, then AcademicHelp (better output quality and pricing) wins over Undetectable AI (better at avoiding AI detection). However, we need to apply a little nuance in this comparison.

These tools exist for completely different reasons. AcademicHelp is made to help students write better without focusing on the menial tasks that come with it. Undetectable AI actually actively discourages students from using their tools. This is because it's a potent weapon for academic dishonesty when used as a supplement to ChatGPT or other LLMs.

I would also like to add, to AcademicHelp's credit, that I was getting better quality results from it the more I used it. Some of their outputs, which I used for the "Detection" part of this article, were far better than the one I used in the "Quality" section. However, I maintain the opinion that Scribbr or QuillBot is still a far better plain paraphraser than AcademicHelp.

So, here's the conclusion: If you're looking for an AI bypasser, Undetectable AI is a no-brainer. If you're looking for an academic paraphraser, AcademicHelp is a good choice, but it's also worth looking at QuillBot.

Before I let you go, I suggest reading one of our other articles on Undetectable AI. Have fun!

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Written by John Angelo Yap

Hi, I'm Angelo. I'm currently an undergraduate student studying Software Engineering. Now, you might be wondering, what is a computer science student doing writing for Gold Penguin? I took up studying computer science because it was practical and because I was good at it. But, if I had the chance, I'd be writing for a career. Building worlds and adjectivizing nouns for no other reason other than they sound good. And that's why I'm here.

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